A few thoughts...
Take some goodies for the office to share earlier in the week...perhaps Monday 5/7 with a card? I like to take bagels vs. sweets. Another option is to have an Edible arrangment delivered early in the week for the staff to share. Or, go to Bath & Body works or someplace like that and buy a variety of good smelling antibacterial hand soaps, hand wipes and hand sanitizers and put into a basket for the school staff to use. They have to wash their hands and sanitize so frequently that some of the good smelling stuff would be a nice treat. You also can offer to have lunch brought in for the staff one day that week (perhaps ask the other parents to contribute to make it more affordable). If you want to get something for each provider, so other options....get some good individually wrapped candies and put into a cute box or bag to give each teacher. Travel candles (the little candles in a tin) or cute votives also are an option. Get some cute pots and some spring flowers and plant individual flowers for each provider with a card that thanks them for helping your child grow.
Usually, I take a little something for each of my daughter's teachers and the director and then a larger food item for the staff to share. Her last school made the entire week "teacher appreciation week," so you parents could stagger treats throughout the week. Our school had parents provide a luncheon and then we also contributed a small amount per family so that each provider could receive a $100 gift card. .