Oh God! Ds2 (yr 6) had his last book day at primary school today.
I also have Ds1 in yr 11, and they don't really do WBD as such in seniors (ds2 will be going to same school)
I've spent fecking years making costumes - and improvising - Noddy, Just William, Captain Underpants, Horrid Henry, William Tell, a Dalmation - and countless other more involved stuff. Ds1 was a nativity shepherd so often that I made his own costume - (he got to the point where he demanded his own border collie) and snowflakes and elfs, and an absent minded professor...
There was the time that ds2 was cast as narrator no. 3 in the nativity. I scrabbled around for all black stuff as dictated on allocation sheet, to find a couple of days before, he had been demoted to sheep number three... he was a bit disgruntled really.
Then there's been the odd lost bookbag letter, and the subsequent "Hey mum! it's assembly tomorrow, and I have to be dressed as a small woodland squirrell! Yay!
Today, their classes had themes - theirs was 'The Cat in The Hat' so I sent him off in red onsie with white cloth signs pinned to back and front saying 'Thing 1' - a blue swimming pool shoe cover on his head, with blue wool drawn through...
Am a single working parent, and it's been a pain in the arse at times - and sometimes am slack - taking them in on inset day - I forgot dress as a sports character day once, but ds2 put on his PE kit and improvised 
I still have comic relief and end of term production yet - but quite a bit of me will miss these days 