DIY Alka-Seltzer Lava Lamp Tutorial from The 36th Avenue here. For two other Lava Lamp tutorials go here: truebluemeandyou.tumblr.com/tagged/lava-lamp
DIY Vintage Hair Style Sewing Cards with Templates from handmade charlotte here. *You can buy blunt needles for kids.
DIY Plaster of Paris Robot Tutorial from funkytime here. *I remember as a kid pouring Plaster of Paris in tiny milk cartons, then carving designs into the block.