My grand daughter is five months old I babysit 10 hours a day but she is also a live in granddaughter.?

my granddaughter wakes up @ 8:30 am she gets feed & pamper change. I put her in the walker but she winez the wineing get worst I put her the hight chair, play pen stroller with all the toy she can handle & more but the wineing get worst no matter what I do the wineing turns to a cry the only thing that stop her is picking her up but she is just to heavy for me to have her in my arms for a long time when her mom come from work it the same with her and this goes on til about 10:00pm that she gets put to bed. Plz help she really wants to be held all day long.