I went to the Odeon this morning to see UP. I took two children and it cost just £2 for two adults and two children! Very very good value.
(Went on the train using a Family railcard so cheap travel £4.50 total, followed by bargain Subway Kidspak at £1.99 each. Kids are happy, we're happy!)
Not sure if the £1 deal is nationwide - we went to the Odeon in Weston Super Mare. Not busy at all.
"ODEON Kids screenings have been chosen especially for children and are every Saturday and Sunday mornings at pocket money prices. What's more with every child ticket you get a free adult ticket - so mums and dads get to go FREE!
ODEON Kids runs every day throughout most school holidays. Please check cinema listings for more information."