Grade 3 and up. Make learning electronics easy and fun! Each set of building blocks with snaps enables young experimenters to create different electrical and electronic circuits. The sets include switch blocks, lamp blocks, battery blocks, and varying length wire blocks, to mention a few, in different colors and numbered for easy identification. The upgrade kits expand each set up 1 level, providing new parts to build hundreds of additional projects. Every set and kit comes with instructions for projects.