Vincenzo330,
My daughter (who turns 5 next month) has been begging me to make her my "little Ghostbuster", so she can do events with me. I had planned on buying a RGB pack and doing sort of what you've done here. I'm really inspired now, and I just won an eBay lot this morning which includes 2 complete packs, a trap (pedal missing), and some other miscellaneous RGB parts. After seeing what you've done here, I'm even more anxious to rip into this project!
Good thing I got 2 packs, because my 2 year old daughter will surely want to copy big sister (and that's just fine with me).
Again, the work you've done on your project is really outstanding... very well done.