Our little lad will be 2 in May and we too bought him an inflatable bed (My First Ready Bed) but we have also bought him one of these sleeping bags....
We trawled the internet for HOURS and this was the best of the bunch in our opinion. It's 170cm long so will last him for a few years yet. If you are using a ready bed like us, you can pop this under the top cover and fold the bottom over or under. I've taken the toggle out of the hood of mine though as he's a little devil for anything like that. I've also bought a cheap and fairly thin fleece blanket to pop inside and tuck around him (once he's asleep!) if it's really cold.
A bargain for the price too!
Hope this helps,
------------- Claire x
Jan 2013 - Skiing, Kühtai, Austria
May - Swiss Farm
Fforest Ffields
Aug - Saumur, France
Oct - Somewhere...
Jan '14 - Skiing, Les Houches
I think you're right about kids wriggling down to the bottom of the bag so some come with straps to shorten the bag or you can fashion something together yourself so that the bag it the right length (webbing,ribbons,velcro etc).
Kids tend not to like the mummy shape too.
------------- A wise man learns from his own mistakes - a genius learns from the mistakes of others
I know what you mean about the mummy shape winhill, but a 2 yr old isn't going to get far enough into the bag to notice the shape. The benefit of the mummy shape is there is less air surrounding your little so more likely to keep him warm. I've already tried my little lad in it (he's currently 22 months and is shorter than average for his age!) and he was just fine.
------------- Claire x
Jan 2013 - Skiing, Kühtai, Austria
May - Swiss Farm
Fforest Ffields
Aug - Saumur, France
Oct - Somewhere...
Jan '14 - Skiing, Les Houches
When my daughter was small I cut down her Dad's old bag which he'd split at the top with his broad shoulders, just cut the top off took out the zip and sewed it up again.
My son was more of a wriggler and used to wriggle out of it so I used to take a quilt for him instead, when he wriggled out it was easier to throw it back over him than get him back into a sleeping bag.
He's still a wriggler (aged 12); we all use quilts instead now.
------------- Caz
If you can't see the light at the end of the tunnel, just keep going till you go round the bend.
I dont have children but I did see a Coleman sleeping bag for children that could be shortened then lenghened as the child grew. Dont know if it is still on the market as this was spring 2004 when we were shopping for new sleeping bags for ourselves. They werent mummy shaped though. They were the envelope type.