Where can you launch a hot air balloon, create an electric circuit and watch a colony of ants at work in one day? Techniquest - the hands-on science centre in Cardiff Bay.
When you tire of playing, you can take in a show at the Science Theatre ( Slime, musical sounds, and robots have all featured on the bill so far in 2007!) and watch the stars in a guided session in the Planetarium. Open daily, suitable for children and adults.