'Electromagnet' by Miriam, Beatriz, Lidia and Ángela T.

'The union does not make the force' by Pedro, Marcos, Daniel S. and Daniel G.

'Total internal reflection' by Iván Gi., Francesca, Iván Gu and Héctor M.

'The union does not make the force' by Ángela, Julia A., Paula A., Daniela and María

'Magnets' by Abel, Héctor U. and Adrián C.

'The crazy straw' by Julia Ma., Inés J., Ainhoa and Inés B.

'My flashlight' by Alejandro P.

'An electric circuit' by Rodrigo

'What weight can an egg support?' by Nayara Ga., Paula B., Rubén and Alejandro L.

'Potato battery' by Gabriel, Hugo, Lucas and Miguel

'Magnetic forces' by Violeta, Inés J., Leire, Esther and Pablo

'The magic can' by Iudita, Beatriz A., Jorge and Dessirée

'How to make a compass' by David E., Zahira, Carolina and África

'Hidroelectrical power plant' by Inés G., Cristina, Iker and Marina