Life Science

Plant seeds

Cut open fruits and vegetables and count the seeds

Grow food scraps: carrot tops, potato eyes, scallion bottoms, onions, garlic

Dissect flowers, dig up plants to examine the roots

Sort stuffed animals into groups with common characteristics

Make/compare fingerprints

Examine pupils in the mirror with lights on/off

Observational drawings of twigs, shells, other natural objects

Observe a worm, spider or other creepy crawly

Physical Science

Explore water--what floats or sinks

Make tinfoil boats and see how many pennies they can hold

Test materials to see which are magnetic and non magnetic

Build ramps/raceways and marble runs

Make paper airplanes

Experiment with flashlights and mirrors; can you get a light beam to hit a target using a mirror?

Experiment with sound: make rubber band instruments, glass/water xylophones

Chemistry

Follow a recipe

Bake bread

Make salt dough

Make Slime/flubber/oobleck

Earth/Space Science

Collect rocks; rub them together, wash them in water

Observe weather patterns, clouds, temperature

Examine soil from different locations

Observe the stars at night

Track the phases of the moon

Engineering

Build the tallest/strongest tower out of blocks/paper/marshmallows and toothpicks

Design a solution for an everyday problem; build and test a prototype