This robot arm is built of high quality materials, which makes the whole arm very durable. Instructions are very helpful and easy to follow. Both myself son and myself had a ton of fun building it, and now even more fun playing with it.
The inner child in the grownup wakes up when working with this device.

This toy was a perfect step up from the typical robotics found in toy stores. Fully building the gear boxes and integrating the motor controls added more interest and complexity. The pieces fit together well and the arm fully works! This was independently completed by my 9 year old. I would recommend this for kids that have out grown the more generic kits 😁

This was a present bought for my 10 year old grandson.
Terrific choice in that although I found it was generally beyond his technical ability and fine motor skills, he was totally engrossed as we assembled it together and totally mesmerized by the arm's ability to be operated by levers remote from the arm.
The 'box' suggests that this challenge is for those 10+ years old. It would be a very remarkable 10 year old who could put this together unaided. But then, working on this project together was probably closer to the rationale for buying it in the first place.

My son (8) got this as a Christmas gift and it was easily the most excited over this gift. He and I spent time over the next couple mornings building this cyborg hand together Watching it take shape. It is very neat now that it is complete

I bought this for my sons birthday. It was too difficult for him to put together and this was not made for the age listed on the box. The lizard broke three times when parts were either being put together or taken out of the form. I had to order replacement parts which took a couple weeks to receive each time. My son went to put the lizard on the floor and it dropped maybe a foot and 4 of the joints shattered. It was a complete waste of money and has ended up in the trash. The store I bought it from wouldn’t take it back as a refund and I’m not paying for more parts.

The Cyborg hand was super cool to put together and fun with the hydraulics. We recieved it as a gift for my 4 year old, I had to so the assembly because of his age, but he loves picking up things and pretending he has a robot hand. Also seeing how the mechanics of it works was neat for him. The assembly was easy and clear from the directions and the way it was packed. It looked like a lot at first but it came together within a couple hours. After 6 months I put new water in it and that was just as easy. Would definitely recommend!

My husband and I loved building this together and it took very little time. My one year old loves watching us wind up the car and chasing it around the house.

Intricate, and attention keeping toy. We had so much fun finding and connecting the bits to build our solar car.

I received the 8 in 1 Solar Educational Kit for free from @playwithunicorn and I loved playing with it. The kit starts by building two modules, and then there is a choice of building 8 different mini robots using one or both of those modules. There are also disassembling instructions, so you can move onto the next robot if you want. Building two main modules and the dino walking robot took 45 minutes total, including figuring out the instructions and fixing a small mistake I made. It's the perfect building kit for a tween or a teen. There's so much physics that can be learned from this kit, especially different types of energy conversion. Learning through play is THE BEST, and I still remember things I learned through hands on experiences like this. I will save it for my daughter to build together when she's older and shows interest, but I can't recommend it more.

My girls absolutely loved this solar 8 in 1 robot kit! They were so amazed that the sun could actually make something move without having to use batteries. This makes for such a great gift!

Hello, This is my 6 years old niece’s review of the “Spiral Spring” car: I liked building it. Some parts were a bit hard and I needed help but it was fun. I like cranking it and playing with it. I will try to build the other models!

My girls loved being able to choose lots of different robots to build. This toy is educational and fun. I think a great option for boys and girls. Good quality and a great price!

My kids had so much fun playing with their S.T.E.M 8 in 1 solar robot. They loved learning about how solar energy can make the robot move without having to use batteries. We couldn't wait to pick out our next robot to make next!

My son loves building things with his dad so he was so excited to get this robot kit. It takes about 20-30 mins to build. There are lots of little parts so not ideal for small kids. The instructions were easy to follow. A great afternoon activity.

My husband made this with our 5 and 3 year old and they had so much fun. With kids this age it definitely needed assistance but my nephew would’ve been able to do it on his own at 8. The instructions were simple, the kids loved learning about how the solar power worked and it was a TV free evening! Would definitely reccomend!

My 10 years old enjoyed a long moment working on this. The mechanisms are very impressive. A few pieces were lost in the process (or missing?), filled the form on the website and had a very good service, received in one week. My son found it quite interesting but challenging, there was a few cases where it would jam because he cannot execute everything perfectly. One time it was an execution error (backtracked and found himself, good learning), other cases was a small detail (eg attaching pins not fully removed), and finally some cases where we couldn’t fully find the cause (something would create some resistance). The resulting arm works, but the opening/closing of the grippers works only sometimes, something is not running smoothly. All in all, despite the challenges, he enjoyed, and we ordered the wired control robot arm, which should be simpler, and will be interesting to compare both.

Unicorn Toys provided great service, and the product arrived quickly. All pieces arrived in perfect condition, and nothing was missing. The only extra tool you’d need to get is a pair of diagonal cutter pliers, or a good pair of small craft scissors. No glue is required, as all the parts snap together.

The kit comes with an instruction booklet that consists mostly of visual instructions with very clear diagrams. The set includes 1 small solar panel, a few metal pieces, a few gears, and 4 sheets/trays of plastic pieces that have to be cut out. I really appreciated that the trays had tabs that very clearly indicated the letter and part number of each piece (Ie. A1, B4, C7, D15, etc.). Also, each piece is designed so that front and back look different. This, plus the diagrams in the instruction manual, makes assembly pretty straightforward, because it is clear which piece you need, and which direction it needs to be facing. (It would have been even more helpful if the part number was also included on each piece so that you could easily identify them once they were cut out of the trays, but the instruction diagrams are clear enough that it’s not completely necessary.)

The first step is the build the base with the solar panel. After that, a different combination of plastic pieces are added on top of the base and swapped out to make the different models. Some plastic pieces are re-used between different models. Since there is only 1 solar panel base and some re-use of pieces, you can only make 1 robot model at a time. You have to disassemble your current robot before making the next one.

I think making the main solar panel base took me 20 minutes. Before you move onto the next steps, hold it up to the sunlight to test if the gears move correctly. (If they don’t, either the sunlight isn’t strong enough, or you might have done one step incorrectly. The solar panel only responds to very bright and direct sunlight. If there are any clouds or shadows, the parts won’t move.) You only have to assemble the solar panel base once. For the rest of the robot assembly, each robot takes around 35 minutes to 1 hour the first time you make them. Cutting the pieces out and removing the little nubs the first time is a bit time consuming. Otherwise, assembly is pretty quick. (Side note- you will likely have lots of tiny nubs of plastic lying around after cutting the excess plastic from the pieces. These can be easily swept away.)

Once you have made each of the models the first time, disassembling them and reassembling another one only takes a couple of minutes. When disassembling the robot, you can leave some of the interlocking pieces together, and just carefully detach them from the solar panel base. After I disassemble one robot, I store its pieces in a plastic bag labelled with the robot name. This allows me to quickly reassemble it in the future.

Overall, I think this would be a great activity to encourage creativity and curiosity in kids. The assembled robots look just like the pictures on the box. It’s fun to see how each robot model moves. I highly recommend this kit to anyone with kids who are very hands-on and like to tinker around.