What's the name of this old kids show?

i would like to remember the name of this old kid show i use to watch. (it's NOT a cartoon, it's with real child actors)I remember it was about a sister (i think she was dressed in yellow pj's) and her brother (who wore red pj's) and after their mom tuck them to bed their pet hamster would give them a mission like fly to the moon or ride a train. there was this bubble that has a smiling face or babyish face that sends them to their adventures. and they would also go in a closet were their friends are wait to play with them. but they had to get back of bed when their mom checks on them and the mom would always find something that was part of the kids adventures like a astronaut helmet from walking on the moon for example. that's all i remember so do you know the name of the kids show.