Aww they will not be expecting anything as this is their job and the fact you are happy with service they provide will be lovely for them to hear. A written letter thanking them could go a long way (this might be shared with managers above etc) but Biscuits/ chocolates I'm sure would be very much appreciated and not too expensive. If you want to do something personalised maybe buy some flowers and give staff 1 individual and wee chocolate bar or cupcake? Very kind of you xx
I’m getting a big box of chocolates to share and a card saying Thanku to everyone for their efforts in my sons journey x