Time with parents. As a parent you can turn most any activity into an opportunity to learn math, science reading or whatever. Just asking questions is the core of learning. For example, the start of learning math is gaining a deep understanding of basic numbers. Simple activities go a long way... count things, add them together, split into groups, and so forth.
Also don’t foist your own desires and dreams upon your children. It is good to expose your kids to quality stuff, but be aware when this is more about your desire than theirs.