Without a good bubble recipe, the bubbles will be popping before they ever leave the bubble wand.
And, as we all know, bubble-blowing is one of the coolest kid birthday party activities, regardless of which theme you choose.
You can get Glycerin at almost any pharmacy. Mix one party Joy or Dawn dishwashing liquid with 10 parts distilled water and ¼ part Glycerin, let the mixture set overnight, and you're all set to make Monster-sized bubbles. Here are a few more bubble recipe ideas to experiment with.
As for bubble-making devices, there's one hiding in many of the objects lying around your house. Some ideas are: string formed into a loop, a hanger bent into any shape, a tin can with both ends cut off, a straw, a piece of tubing, the plastic holder from a six-pack of soda, cookie cutters, you get the idea.
And finally, here are a few cool ideas for bubble games. Ready, steady, blow.