We haven't done too many projects or crafts lately because we've been too busy playing outside, but the past few days have been so hot that I've pulled out our trusty art box.  Luke's very favorite thing to do is make volcanos.  Baking soda + vinegar + food coloring=a very happy Luke!  He could do this activity for a good 30 minutes if not longer so I usually pull it out when I'm cooking. He uses a medicine dropper to drop the vinegar and usually we have lots of different colors so it ends up looking like a rainbow.  Very fun!