£20 EACH (i.e. £60 for me, DW and DD) for the worst seats on a green space c. 70 yards from the stage and all it was was literally no more than a few chumps (or possibly the same person) taking turns on stage in Pingu, Angelina Ballerina, Barney and Underground Ernie costumes just dancing to music for just over an hour and THAT'S ALL . No activity and no involvement except for singing and dancing along to the single character on a distant stage, no freebies, nothing for the parents at all and a presenter on stage with Pingu who looked like a heroin addict. Awful. Surprised JF was willing to lend his name to such a shambolic mess.
My sister saw the Tweenies live with her two kids and said it was great. Shame it's not on in London, but it might be somewhere near you.