If science experiments and math books are what the kids ask for, then that's what you get them! That's a no-brainer.
My response to critics would be something like, "Well, this is what they asked for because this *IS* fun for them. They just love seeing what happens when they try new things. They're so curious!" With a big, carefree smile.
The carefree smile is the key. If you seem nervous about what you're doing, they'll smell the fear and pounce on you. But quiet confidence works virtually every time.
