What about hikes (there are lots of fun hikes in the area, OP where about a are you located?), you can teach her to ride a bike, or if she already knows take a long bike ride to a destination (I’ve taken my 4yo on the WOD trail and we’ll ride a few miles to a picnic, play in the river, get ice cream, fly a kite, sometimes we just ride in circles around a block near our house that has a fun hill to ride down, etc). Frying Pan farm out near chantilly has baby animals that time of year, which is always fun to visit and it’s outdoors and free so you can drive by and see if it’s crowded before committing. We recently did a hike at rock creek park that was fun, kids love throwing rocks in the water and could do it for hours. Have fun during spring break, it’s nice to have solo time with your older kiddo.