My first two went right to their beds no problems when we switched them to beds.
My youngest...it took about two weeks to get that little booger to stay in bed! Just be consistent and keep at it. Put him back and walk out, put him back and walk out, put him back and walk out...
Stick to your routine, don't and or subtract anything. Keep the same routine as before, just without the crib. (you did remove it, right? if not, do that too!)
Not sure what mashed potatoes will have to do with keeping a toddler in bed, though.
at 2:12 PM on Apr. 22, 2009