I love a good deal, especially when it's for school supplies. Kids.woot.com is a great "deal-a-day" site for a wide variety of children's products. Today's deal is for a Thames and Kosmos science kit or electronics kit. A quick price search on Google shows that these usually go for about $80 or $90, but Woot has it for $39.99, including shipping.
The kits are for older kids, but I grabbed a Fun and Fundamentals Core Science
because it's such a good deal. I'll tuck it away in our school cabinet to have for later on. 135 different science experiments await!