A great idea to help toddlers develop fine and gross motor control is by letting them use all of their arms! Fill a bucket with water, give them a 1 1/2-2" paintbrush and show them how to "paint" the walls outside. The kids love it and it's a great activity.
Set up an obstacle course for little ones to walk, run, ride bikes through etc. Use large boxes with the ends open to go through, cones to go around, 2 jump ropes laying parallel to one another to jump across (like a river), hula hoops, tires. The possibilities are endless with this one.
As an alternative to a pool on a hot summer day fill a small children's wading pool with cooked spaghetti and a small amount of vegetable oil. The children will enjoy the slippery feeling but make sure they are careful not to hurt themselves falling down. Have a sprinkler set up nearby to rinse off afterwards. *Warning: this will kill your grass so put a large plastic tablecloth under the pool.
While taking a walk one day try this fun idea, Take masking tape and make a bracelet around the child's hand sticky side up. Then encourage children to gather items to stick on their bracelets such as leaves flowers etc.