Hey Ula guidesBelgium travel guidesHomeGuidesEuropeBelgiumAtomium, natural-science halls and under-6 travel on the Brussels network.BrusselsFamily travelBrussels · With kidsBrussels with kids: things to doSTIB under-6s, Atomium height rules and hours, Natural Sciences fees and the Ixelles children's museum: a sourced family shortlist for Brussels.