Snakes & lizards

You know, since is Summer break and the kids are in vacation, I need to find funny way to do math with my kids. This is the fun problem that we resolved it last night. Hope you like it!

How many snakes and how many lizards are in a group, if there are 30 heads and 72 feet in total?

Note: Tip – look at the picture below.

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I need some help

My kid is in third grade and he got 880 at his lexile level. Hurray!!!!!!!  So, now he needs to read more advanced books and I’m willing to pay a fee to got access to some books that he can read online. I know that real books are more appropriate for him, but I don’t always have the time to go to the bookstore and buy them.

Do you know any website where my boy can read books? As I said, I don’t want free websites (although it will be nice to know about them), I am open to pay for the services.

Can you help me?