Place short lengths of string on a fence for birds to take. As you and your child watch the birds building their nests, you can see what materials which birds like best. You can also notice where the birds put their nests. Some birds nest high, others on the ground. Look at the nests, but be careful not to touch or disturb the nests.
Bird watching itself can become a year-round activity.
Spring is a time for planting. Children can learn about what plants need in order to grow. Sunlight, dirt, water, and sometimes food. Planting a vegetable or flower garden is an excellent way to develop math and science skills. Children can count out how many seeds they need to plant.