32 Easy homemade bird feeders! Inexpensive projects using common household materials. Terrific ideas for all ages. Some are easy enough for toddlers and others are perfect for teens or crafty grown-ups. Great way to help your neighbourhood birds make it through winter, and fun way to learn about the birds native to your area. - Happy Hooligans
20 Insanely Clever Gardening Tips and Ideas (with pictures!)
Get your seedlings off to a good start with their very own little greenhouse! The bottom 3/4 part of a plastic soda bottle makes for the perfect little dome to cover your little pots with. This would be a fun project to get the kids involved with.
It's so important to let children do things themselves. You don't need to "do it the right way" — just doing it is enough. Of course, a two year-old isn't old enough to do everything, but you would be surprised how much he can accomplish with just verbal instructions.