In the United Kingdom Mothering Sunday will be on 3rd April this year, as it is always the fourth Sunday in Lent. It is traditional in many schools for the children to make either a card or a small gift for the children to present to their Mum's. I really like this 'Chore card' which is a flowerpot filled with seperate card flowers, with each flower having a different chore the child promises to do on the reverse, bringing home the message that children should be helping out their parents. Using the same theme of flowers in a pot you could try this pop up flowers card, which links nicely to objectives in the QCA Moving Pictures unit. Along the theme of helping out Mum, children can type out and print a set of coupons or vouchers, which entitle Mum to the services of the child to complete the jobs they have put on the vouchers. This same site also has a whole range of printables, including cards,bookmarks, worksheets and themed writing paper.
If you would like to make a gift there are loads of ideas here, that include a woven paper basket, tissue paper flowers or a flowerpot pen holder. You can find some simple worksheet style activities for very small children, including a mother and baby matching activity, badges, frames and simple card printables here, at My Chalkface.
For and easy to understand explanation of what Mother's Day is in Britain, use the Woodlands website, which is aimed at primary age children, and if you register with TES you can download a free powerpoint from their resources section for use in the classroom on the interactive whiteboard.