Here are some ideas of what to do with children in Madrid:

Parks and Playgrounds:
- El Retiro Park: This expansive park is a haven for families, with playgrounds, a boating lake, puppet shows, and plenty of space to run around.
- Madrid Río Park: This riverside park offers playgrounds, skate parks, a climbing wall, and even an urban beach in the summer.
- Casa de Campo: This large park has a zoo, an amusement park, a lake with boat rentals, and plenty of green space for picnics and playing.

Museums and Attractions:
- Zoo Aquarium de Madrid: See animals from around the world, including pandas, dolphins, and gorillas.
- Faunia: Explore different ecosystems and see a variety of animals, from penguins to butterflies.
- Museo Nacional de Ciencias Naturales: Discover fascinating exhibits on dinosaurs, animals, and the natural world.
- Museo de Cera (Wax Museum): Meet life-like wax figures of famous people and characters.
- Parque Warner Madrid: Enjoy thrilling rides and shows at this Warner Bros.-themed amusement park.
- Teleférico de Madrid (Cable Car): Take a scenic ride over the city and enjoy panoramic views.

Other Fun Activities:
- Puppet shows in El Retiro Park: Enjoy traditional puppet shows on weekends.
- Ride the "Strawberry Train" to Aranjuez: Take a scenic train ride to the historic town of Aranjuez, known for its Royal Palace and gardens.
- Visit the Sweet Space Museum: Explore a world of candy and sweets, with interactive exhibits and photo opportunities.
- Go ice skating at the Palacio de Hielo: Enjoy a fun day of ice skating with the family.
- See a flamenco show: Experience the passion and energy of flamenco dance.

With its diverse attractions and family-friendly atmosphere, Madrid is a great place to create lasting memories with your children.