"He's (Solskjaer) signed people who aren't just good players, but also really good lads as well," Shaw told Manchester United's website.
"They've integrated in the squad really well and brought a bit more energy and togetherness in the group.
"That's particularly true of Harry. He's really trying to make sure we get more things done together as a group going forward.
"Youngy was brilliant, really tried his hardest, but sometimes it was difficult to get things done as a group.
"Now we've made a pact that whenever a team bonding thing happens, we all have to do it or we get fined. It's great for the team to be together and do things together."