How about sorting different tea bag shapes circles, pyramids and squares. Counting tea bags and matching them to cups to see if there are enough or too many. Creating colours with herbal teas, green for mint, red for rose hip, yellow for camomile. Putting loose tea into trays for exploring or for making letters or numbers with their fingers. Sorting Tea boxes. Warm (not too warm obviously) water in the water trolley with tea pots and cups and saucers. Reading fortunes in the tea leaves. Making tea adverts.