"Mums are like buttons, they hold everything together" a lovely gift for Mother's Day, or for a birthday, or a thank you at a wedding.
"If mums were flowers I'd pick you" another lovely gift for Mother's Day, or for a birthday, or a thank you at a wedding. The wording can easily be changed, eg "If Friends were flowers....."
Finally, a personalised wedding horseshoe surrounded by a button heart
They cost £10 each plus £3 P&P