Honoring the life of Baby Kailee

My sister and her fiance are dealing with the worst pain you can experience, the loss of a child. Their 4 month old daughter suddenly passed away. They have 2 other children to take care of and aren't able to work right now, so any help would be so appreciated to help with their current bills, and so we can honor baby Kailee the best we can. Thank you so much in advanced.