Do any of you have personal experience with Timberdoodle? I'm really considering beginning my 4 year off in Kindergarden next year with this curriculum. It looks very organized, teachable, and fun! I have a couple questions. Is this curriculum something I can use twice? My boys are 18 months apart, they will be learning together, (hopefully) Also, has anyone actually gone year to year (to year) with this curriculum? Thank you.