You will need:
Old dried out markers
Large cups to mix / empty jars for storage
Afterwards: Brushes and paper
Remove pen lids and have kids sort by color family. We had 5 groups, but you could of course split it out further if you have enough pens.
Place pen families upside down into cups half full of water and leave overnight.
The following day remove pens, place in bag and recycle. You could also see if your local elementary school recycles pens or better still get them to, for more information. Crayola pens themselves are plastic 5 which can be recycled so check with the recycling pick up in your area.
Keep liquid watercolors in jars for future use.
Paint, paint, paint...here's some pictures being made with our wonderful homemade paints.