What you need:
One 9- or 12-ounce plastic cup
1 to 1 1/4 cups of potting soil
1 tablespoon of grass seeds (such as rye grass at a garden center)
Decorations, such as office dot stickers, markers, and ribbon (for safety, it should measure less than 6-inches long)
1.Fill the cup halfway with soil. Divide the remaining soil in two, then have your child measure the seeds and stir them into one of these halves. Tip: To speed germination, you can first soak the seeds in water overnight.
2. Spoon the seed-filled soil into the cup, then top it with the remaining soil (this final layer should be about 1/8 to 1/4 inch deep). Water the soil well.
3. Let your child decorate the cup with stickers and markers. Finally, leave the plant in a warm, sunny spot to sprout. Water as necessary to keep the soil about as wet as a damp sponge.