Other Mumsnutters will hate me for this, but I can handle the flaming...
MacDonalds. Once every now and then. And drive through - you don't have to endure the restaurants. I swear dd2 is never happier than with a happy meal box filled with fishfingers, fruit and most importantly, a toy.
That to her is magic. To me it's a pretty ghastly box of crap, and I try not to think about it. But to her it gives her a lovely warm feeling and something to look forward to.
Other things they love are: drawing and colouring, helping out in the garden - we grow our own veg too, (offsets all the Macdonalds crap they eat ), dressing up, imaginary games with pirates and Barbies, even sleeping together or swapping beds some nights! Scooter rides, bike rides, my six year old loves to go out running with me. Swimming, park, day trips to the beach (doesn't have to be expensive - we live within 90 mins of some of Devons's loveliest beaches. Country walks, ice creams on a bench. Fish and chips out of the wrapper. Singing in bed at night together, BOOKS (once they learn to read on their own they can unlock their own magical worlds - books like the Secret Garden, Alice, A Little Princess, Little Women etc)...
Of course there are days when I can't entertain them, in fact I'm crap at entertaining, and they have to go and get creative, but they are really happy doing their own thing most of the time. Some days they get bored and cross, and that is just life really. The best childhoods are the ones where the magic is not forced, and where kids are allowed to just get on and be kids. My best memories are of the most mundane things, but they gave me a sense of security and rhythm, and if you can provide that security, and bring them up in a relaxed house, the 'magic' will take care of itself.