Number three: The engineer

The last one: "The engineer" because he spent *lot of time* doing "experiments" with his pushchair (or stroller) into water... It was delightful to see his dad to let him to do his experiments without to stop him but just keeping a careful eye :-)
L'ultimo: "l'ingegnere" perché ha trascorso *un sacco di tempo* facendo "esperimenti" col suo passeggino nell'acqua... Era delizioso vedere il suo papà lasciarlo fare senza intervenire ma solo non perdendolo di vista un attimo a debita distanza :-)