Please take your phonics outside and enjoy the beautiful day.
Why don't you use chalks to write the graphemes in the phase 3 planning?
Try using old cereal boxes or old birthday cards to cut small squares of card out. Then write the letters of your child's name on individual squares of card. Hide the cards around the garden and ask them to find them. Once the cards have been found tell them that a wonderful word is hidden in the jumbled letters. See if they can make small words from their name and then see if they can find their name.