Where breastfeeding is not possible, babywearing can aid attachment by encouraging closeness during bottle feeding. Daycare providers and foster parents often find that babywearing allows them to better meet the needs of multiple children by freeing hands during times when babies need to be held. It is possible to wear two children at once; this is known as tandem babywearing. This can be done with twins or with two children of different ages, for all the reasons of practicality and enjoyment stated above.