Let your kids feel like real craftsmen! A great little tool for sanding. Sanding is a good way to introduce a simple joys of working with wood. 
This Corvus tool for kids is very handy and easy to use. 

There is two options with the Sanding Mouse. The Sander Only option comes with 1 piece of sanding paper and the Sanding Mouse with Replacement Sand Paper comes with an additional 6 sandpapers.

The substitution sandpaper is included in different grain sizes: 
1x 60,1 
1x 80,2 
2x 100,2 
2x 120 Made in Germany