This is, hands down my favorite blog of all: Having Fun at Home. The entire site is dedicated to simple, inexpensive and creative ways to have fun and help kids learn.
Because Katey, the writer, has a toddler, most of the ideas are for this age. This is perfect for me since Baby Girl is fast approaching toddlerdom! I have saved almost all of her ideas to use in the not to distant future.
I really appreciate that the ideas are so simple and can usually be done with things you already have around the house. Katey also does a great job of posting regularly (I have no idea how she keeps coming up with this stuff!)
Here are a few ideas I can't wait to try:
Magnetic Flower Arranging
Magnet Letter Game
Pickle Jar Lanterns (this isn't a toddler thing but I love it!)
I highly recommend browsing her site for more fun ideas.