playing shop is a great group game (lots of jobs to allocate, not to mention shopkeeper and customer roles), the accessories are pretty good too (and particularly appealing if they don't actually make irritating beeping noises)...
 

   playing shop kids shopping toys till scales checkout basket bag play food shak shuka hedgehog tickety boo babi pur babystylefile baby style file   

1/ metal shopping basket, £6.90, hedgehog
2/ grocery scales, €32.95, shak shuka
3/ hape checkout register, £23.99, babipur
4/ shopping net basket by haba, £16.45, tickety-boo