Rome is better with children than its reputation suggests, because its ruins are stories rather than galleries. The obstacles are heat and paving rather than boredom.
Under-18s enter free
This is the big one and many families never discover it.
Italian state museums and archaeological sites are free for under-18s — the Colosseum, the Forum, the Palatine, the Vatican Museums and dozens more.
A booking or reservation fee may still apply, and identification showing age can be requested.
For a family of four this changes the cost of the trip.
What works
The Colosseum, especially with arena floor access, which lets you stand where the fighting happened rather than looking down at it.
San Clemente — three stacked levels descending from a twelfth-century church to a fourth-century one to a first-century Roman house with an underground stream still audible. It reads as an adventure rather than a museum.
Ostia Antica, forty minutes by metro and train — a whole Roman town with streets, shops, a theatre and mosaic floors, plus space to run and almost nobody in it.
The Capuchin Crypt, decorated with the bones of several thousand friars. Older children find it remarkable; younger ones may not.
The Bocca della Verità — the stone mouth that supposedly bites liars. A queue for a photograph, and children generally enjoy it.
The nasoni — 2,500 street fountains where you block the spout and water jets upward. Reliably entertaining.
What is harder
The Vatican Museums — long, crowded, and the corridors toward the Sistine Chapel are a slow shuffle. Book the earliest slot if you go.
The Forum without an audio guide, which is a field of stones needing explanation.
Long lunches at the pace Italians take them.
The paving problem
Sampietrini cobbles are uneven and worn smooth, which makes pushchairs genuinely hard work across the historic centre.
Many sites involve steps and gravel; the Forum and Palatine are rough underfoot.
A carrier is easier for younger children.
Heat and water
The Forum and Palatine have no shade, and Rome regularly exceeds 35°C in summer.
Morning or the last two hours before closing. The middle of a July day is not workable with young children.
Carry bottles and refill at the fountains.
Eating
Pizza al taglio — by weight from a counter — is a cheap, fast and uncontroversial lunch.
Gelato, from a place where the colours are muted rather than fluorescent and the tubs are covered.
Testaccio, Trastevere's back streets, Monti for restaurants. Italian places genuinely welcome children and a half portion of pasta is a normal request.
Avoid the major piazzas, where you pay for the view.
Practical
Book the Colosseum and Vatican even with free child entry — the slot is still required.
Apartments with a kitchen and washing machine beat hotel family rooms on price and space.
April to June and September to October are considerably easier than summer.