As a Saturday morning cinema fan in the 60s, I was very surprised to realize that I had never seen this film. However, even after 60 years it is the epitome of all the things that made my childhood enjoyable; friendships, broken and restored, communal projects, gangs (in a non-violent sense) and kids doing dangerous things. Health and Safety, and the PC brigade would render it impossible to make this film today. The Battersea Bats, a group of pre-teen boys, have their HQ in a semi-derelict yard on the Thames near Battersea. They carelessly run along a wall ten feet above the river, fight and play in and around railway trucks before knocking a rival gang member into the miry waters, only to have a young Michael Crawford dive in to save him. Elsewhere, the titular soapbox is towed, with occupant, behind an Isetta bubble-car and a man is swung around in the bucket of an excavator! Before I forget; the plot involves the gang building a pedal-powered go-kart to race against their rivals the Victorias. A design is drawn up by Bats' boffin "Four-eyes" Fulton and a wonderful cart constructed. Unfortunately, skullduggery is afoot and the plan is incorporated into the Victorias' soapbox. Worse, the Victorias steal and try to dump the Bats' cart. Being a kids' film you know it will be recovered and the outcome of the final exciting head to head on the racetrack is never in doubt. Upon leaving the cinemas, you would be thinking how marvellous it would be if you built a soapbox like the one in the film. You never did of course, but it was fun dreaming. With regard to Michael Crawford, I worked out that, although his character was supposed to be around 12, he was almost 16 at the time and, in a foretaste of his Frank Spencer antics, he performed the dive into the river himself. And coincidentally "Four-eyes'" sister is named Betty, the name of Frank Spencer's wife in Some Mothers Do Have 'Em. I noticed that some of the boys lived in flats on Deeley Road SW8. If you Google it on Streetview, you will see that the flats still look the same today as they did in the film.