The trio march onwards, and you consider them all in turn. From Daisy's tanned skin, to Wendy's naturally far darker skin to the paleness of newcomer Amber, they are each quite distinct. Normally not a big deal, but to a quarter-inch tall man you could be sitting on any random patch of skin and know immediately which giantess is carrying you. That could be very helpful in the future!
They traipse on toward the toy section of the store to search out a present for Amber's son, and as you listen to the conversation between them you learn so much about Daisy even though she says nothing about herself.
She is eager to help and listen, providing a keen ear for Amber's worries. She doesn't boast of her own blissful family life, as that would make Wendy feel bad, and instead allows her friend to focus on what's good in her own life. She's the heart of this group, a loving, selfless person in all ways. You smile as you realise this, warmth rising in your heart even as Wendy's baking hot skin roasts the air around you.
Once in the toy department, the three giants examine a number of different objects. As they turn over immense vehicles and figurines with their casual strength, you sigh at one of your regrets. It might have been nice, at some point, to have acted out that fantasy played out in so much shrinking fiction, where the protagonists interact with and use giant toys. Sitting at the wheel of a toy car, walking the interior of a plastic house, these would have been interesting experiences. Alas, now you are the size of an insect, tiny even to a Lego figurine, and far from able to enjoy such a holiday. With the shrinking machine lost in the beach sands, you'll never experience it now.
You cling tight to Wendy's muscular neck for a little comfort, unwilling to dwell upon such thoughts. This is your life now, the band-aid of an escape hatch ripped away, leaving you with nothing but your own effort to aspire to tiny survival. You wipe away your tears and stand as tall as you are able, resolved now to live as long as you can, and defy the despair.
The laughter of the giant women around you helps. It's infectious, the simple joy they experience as they pick up and play with the toys themselves, one giggling as another flies a toy plane at her fingertips, propeller noises sputtering from her lips. Laughing yourself, you think this could be a chance to cheer yourself up. Getting amongst toys with kids around could be dangerous if they spotted you, but with 'adult supervision' you have a chance to let loose and enjoy yourself for a little bit before getting abck to the grind of tiny survival.
Or, if you're more business-minded, you could take advantage of the temporarily stationary nature of the group to drop off for a bit and see what resources you can gather here. There is a danger that they might wander off before you're ready, but with three giant women here you'll have three chances.