Exploris Touch Tank Aquarium, Tesco Shopping Arcade, Sligo town centre, all day Saturday - free
Med Science Workshops, Castletymon Library, Dublin 24, noon, Tallaght Library, Dublin 24, 2.30 p.m., Clondalkin Library, Dublin 22, 2.30 p.m., all on Saturday - free, booking advised
Discover the National Botanic Gardens, Glasnevin, field trip, 24 p.m. Sunday - free, booking essential
Earth Science Activity Day, National Museum of Ireland, Kildare Street, 25 p.m., Sunday - free
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Planetarium shows, National Museum of Ireland, Collins Barracks, all day Sunday - free
Science Trail, Dublin Zoo, 10.30 a.m.5 p.m., Sunday, family tickets £20.50 (£14 unwaged)