I'd recommend reading this book--Einstein Never Used Flashcards
http://www.amazon.com/Einstein-Never...1240088&sr=8-1
before you make any plans. Learn how children this age learn. What they need more than anything is to play and be read to. You can actually harm them by doing too much formal stuff. You cannot hurt them if you give them good quality, open ended toys, take them on adventures, and let them just be kids.
My son is 4.5. He plays a lot with his friends. He also plays independently (and does a lot of playing chase with his little sister.) He has turned the kids' kitchen into a bakery. We go through playdoh like you wouldn't believe. He makes soup out of ritz crackers and water. He makes sticky rice with mango out of mud...and so much more. He is learning far more from those activities than if I sat down and instructed him.
We do perform science experiments from time to time. He loves to mix ingredients together. It all started when I showed him vinegar and baking soda. We make ice bergs (large ice cubes in tupperware) and compare how long it takes two to melt in different circumstances--one on the counter, one in the sink of hot water. We made crystals out of epsom salt. The ones in the fridge did better than the ones on the sponge on the counter. But there's no theory there unless he asks. It's just observation and fun.
He loves to cook. He watches "How it's made" on youtube and can tell you how donuts are made. (He's only had one donut in his life.) We read Magic School Bus, the picture books of Laura Ingalls Wilder,
www.sonlight.com books, the Cat in the Hat learning library
http://www.amazon.com/s/ref=nb_sb_ss....79_339&fsc=-1 We read, read, read, but we don't do academics. He is flourishing.
In the Einstein book I first mentioned, they did a study of children who went to a play based preschool and those who went to an academic preschool. By the end of kindergarten they were all academically in the same place. However, the kids who did the academic preschool were less creative and more anxious. So my suggestion is you let your kids be kids and let them play until they are ready for more. (especially your 3 year old.)
