Over 55 parts to build more than 175 projects. Tools needed? Zero. For starters, when an iPod® or any MP3 player is connected, vivid LED lights dance to the beat! There’s a strobe light with spinning pattern and a glow-in-the-dark flying fan. In all, this kit makes learning electronics way cool, with parts that snap together with ease. Requires 4 AA batteries, not included. From Elenco Electronics Inc for ages 8-12 yrs.