[tmaly]

I would do some hands on activities to get them curious:

1. egg in water, slowly add salt till the egg floats 2. food coloring / oil / water 3. build a model rocket together then launch it 4. build a battery using a lemon, a zinc coated nail, and a copper nail 5. build a single diode radio 6. play hide and seek, it is a great way to teach them counting 7. make a small garden, plant something and have them tend to the plants 8. get a paper airplane book and make some paper airplanes together 9. get a copy of Anno's Math Games and teach them about patterns