Hiya and welcome
For the younger age range a few basic strategies can be in showing emotions - looking at how eye contact is used, encouragement and praise, possibly visual responses such as clapping. Displaying surprise, sincerity in tone and how positive an adults approach is to the Child / Children's own ideas & information .. training, ratios & awareness.
Stepping up a little, strategies such as delegating responsibilities, allowing Child leadership and promoting ownership of the environment, its routines are good for guiding positive outlooks / reinforcing positive aspects of behaviour.
Displaying work as a group .. as aready suggested, is great for demonstrating pride of achievement. Distraction, intervention and planning techniques or strategies can also be helpful.
Strategies to help communication from Cumbria.gov.uk is a great read
Hth a little, enjoy Silkysteps
xx