My advice, based on experience, is don't spend a lot on curriculum at that age. Our big mistake, discovered too late.
We found some great workbook type books at Sam's club for $6! They were as complete as any of the high tech Abeka kind of stuff for the early years, far less expensive, and enough like the activity books my kids used to love to color and draw in that they liked them and used them.
Focus on math and reading. The rest will come later.
And of the two, prioritize reading higher than math. Reading is the key to everything else except math.