In case you missed it in my flurry of posts yesterday, I put together a preschool frog unit study for D, my 4 year old. You can find it on Squidoo here, or drop me a line and I can send you the pdf file by email if you'd like it.
Here's what day 1 looked like in action (minus the leaping about, excited shouting, spilling of tubs of water, etc).
We looked at the letter F in All About Readings Pre-1 book. We did those activities, then I pulled out the F dot marker page from Jolanthe at Homeschool Creations. D started with the "f is for fox" and the three bingo dabbers, then when he got to the frog picture he started experimenting with blending the colours. He's never shown any interest in this before, so I let him try it out until the paper had pools of ink on it.
Then we got out the file folder game "Fish, flowers and frogs" and played a few rounds.
Basically, you roll the die, and find one each of fish, flower and frog in that colour.
Last, we did a science activity to show how frogs' webbed feet help them to swim. For this one we moved to the laundry room floor, which is more flood-resistant. If it was nicer out (ie not a freak snowstorm) we'd have done this outside instead.
We filled a container with water and D ran his hand through it with the fingers spread open. We talked about how the water flows through, in between his fingers.
D was very excited about this discovery! He said he bet that if his feet were webbed like a frog's, he could swim all the way across the lake at the cottage super-fast!