Los Teques has a branch of Venezuela's popular children's museum chain (Museo de los Niños), with interactive science and technology exhibits aimed at young visitors. It's a reasonable stop if you're travelling with children and the weather turns bad.
The museum is modest in size compared to the flagship Caracas branch, but it's well-maintained and draws local families on weekends. Check locally for current opening hours and admission prices, as these have varied over the years.