To instantly create a fun room... how about a room wrap - FULL wall sized cover that will cover all your frilly pictures and curtains and make the kids feel like they are in a mad scientist room! Source
How clever is this DIY pinata?!? I am so impressed with how she came up with this! Using a balloon and material (see the source) she rocked out a test tube pinata! Even if you just use them as decorations around - these would be great! Source
Grossly fantastic jello "lab test". Boys would LOVE cutting this up! Source and recipe
You could also use jello in petri dish
Cover the food and favor bags with radio active stickers! I have a few friends that cook food that should use these ;o) Source
My favorite mad scientist cake! I love this! Little cotton candy on top, va-la! Source and directions