Mars is low in the northern sky right now and is the brightest object there apart from the moon. It will; have a distint red colour and will twinkle much less than any other stars.
Even with the 25mm you should be able to make out some kind of marking, maybe even a white patch at the top of the disc which is the North Polar Cap. Be patient and wait for those few moments of clarity.
If looking for another challenge, swing the scope to the south and find the Sothern Cross (Crux) locate the star closest to the horizon which is Mimosa or Beta Crucis. Then in your finder you should see a little patch below it and slightly to the right, then examine this in your scope. It's my favorite little cluster, NGC4755 the Jewell Box! This object doesn't mind a bit of power so once you have it centred. pop in the 10mm and see the difference.
Let us know how you go.
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