Help me with some exercise ideas to tighten up my stomach

[SadieContrary]

I'm not massively overweight, maybe about half a stone. Whilst I could easily shift this with sensible eating (and cutting out my beloved Coca Cola) I know I'll need to tone up my tummy.

I've had a baby 18mths ago and I work full time so I'm racing home to spend time with her each evening so going to gym isn't an option.

I'm quite rubbish at exercise, I cycle a couple of times a week but nothing too strenuous so open to any ideas/tips.

TIA

I spent roughly 10 mins yesterday (including some rests) doing planks with a few variations. Forearm planks, straight arm planks, mountain climbers, spiderman planks and side planks with hip dips.

My abs can certainly feel it today! Ouch!

Joe wicks does some good ab workouts on youtube - 5 mins, 7 mins, 10 mins etc

Like these;

Thanks, nbee84, I'll be sure to check it out :)