Leonardo

Teen-aged Leonardo Da Vinci is an apprentice to the painter Andrea Del Verrochio and his friends include the super-clever Macchiavelli and Lorenzo,son of scheming Piero De Medici. Leonardo is impressed by the work of Tomasso, a pavement artist and persuades Verrochio to take him on as another student,which he does. When Tom is caught trying to take Leonardo's notebook the boys are in for a surprise. Tom is a girl called Lisa,in disguise in order to be allowed to paint.

Aware of Leonardo's budding genius Piero steals his notebook but finds it impossible to understand because all the information for his designs are written in code. He brings in Maths professor Pico to decipher it but even he is foiled as Leonardo,at great risk to himself,eventually retrieves his notebook.

Leonardo has perfected a pair of giant wings,enabling him to fly but Macchiavelli has fallen foul of fat,sleazy thief Rizzo,who threatens him with prison unless he can have the wings for himself. Eventually the wings end up with Piero,who forces Rizzo to test them. But will they take the weight of a man twice as heavy as Leonardo?

Leonardo and Tom are commissioned to paint a portrait of young bride-to-be Petronella,who is marrying thuggish,dishonest money lender Lucio solely to free her father from being in his debt. Macchiavelli recognizes Lucio as a man who hurt him when he was a child and,with the artists' help,concocts a plan playing to Lucio's greed by making him pay 100,000 florins for what they have told him is the alchemist's stone,to turn lead into gold. Having parted him from his money they then literally frame him for stealing a painting,freeing Petronella - who guesses 'Tom's' secret but says nothing.

Lorenzo's spoilt cousin Valentina arrives and Leonardo is smitten by her. She also falls for him but then transfers her affections to Tom,unaware that 'he' is Lisa in disguise as girls are not allowed to be art students. When Valentina discovers the truth she sets out to expose Lisa. Fortunately Leonardo's latest invention, a bicycle powered by explosives,is able to head her off before she can tell any tales.

Piero has acquired a 'lightning box',which gives out electric charges and which he plans to exhibit. A curious Leonardo 'borrows' it to study but a devious associate of Machiavelli,Carlo,steals it after giving Machiavelli a hard luck story. Leonardo makes a replica as a temporary replacement,almost getting caught putting it in place, but when Machiavelli learns that Carlo has duped him he helps retrieve the real lightning box before Piero detects any difference.