In the past few years, we have covered plenty of fun building kits here. The Shineyu YC-QC007 is also worth a look. It comes with 2949 pieces to build a remote controlled truck with 2 speed modes. This fully motorized truck can drive in all directions.
More gadgets like this: here
The pieces in this set are made of ABS plastic. You can find out more about it here.
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