Big Ben, Madame Tussauds, the Tower of London — London has everything to send a child’s imagination soaring. Virgin flying club must agree, as members planning a family vacation to London can take their kids for free when they buy a qualifying roundtrip economy ticket.

The tickets are available from Boston, Miami and San Francisco to London/Gatwick and from Chicago to London/Heathrow and must be purchased by Aug. 31 with all travel completed by Sept. 30. Once on board, children will enjoy their own seat-back video screen with a channel dedicated to kid’s programs and video games. They’ll also enjoy special kid’s meals and Virgin Atlantic’s Kid backpack full of games and toys to keep them entertained. For reservations call (877) 747-0123 and, while you’re at it, you might want to call Virgin Atlantic Vacations at (888) 937-8474 to find out how kids can stay free.

If you don’t have any children, or you don’t plan on treating your nieces or nephews, you can always take a friend along for free in Upper Class if you buy an Upper Class ticket. The promotion is good for departures from Chicago, Miami, Newark or Orlando to London and tickets should be purchased by Aug. 31 for travel through Sept. 20. Call (800) 862-8621 for reservations. Both passengers must be travelling on the same itineraries.