That's a bit better... let's look at Entangle...
And let's look at the Entangled effect...
Thus the Entangle spell does quite a lot, stopping or at best reducing movement, inflicting penalties on all attacks, a penalty to Dexterity, and making it difficult to cast spells.
Slick Ice as you propose would only be a problem for a character if they tried to move, causing them to make a Dexterity or Balance check. Then it's basically just the cleric spell Ice Slick or the Wizard/Sorcerer spell Grease, neither of which Druid's get.
SRD said:Grasses, weeds, bushes, and even trees wrap, twist, and entwine about creatures in the area or those that enter the area, holding them fast and causing them to become entangled. The creature can break free and move half its normal speed by using a full-round action to make a DC 20 Strength check or a DC 20 Escape Artist check. A creature that succeeds on a Reflex save is not entangled but can still move at only half speed through the area. Each round on your turn, the plants once again attempt to entangle all creatures that have avoided or escaped entanglement.
Note: The effects of the spell may be altered somewhat, based on the nature of the entangling plants.
And let's look at the Entangled effect...
SRD said:Entangled: The character is ensnared. Being entangled impedes movement, but does not entirely prevent it unless the bonds are anchored to an immobile object or tethered by an opposing force. An entangled creature moves at half speed, cannot run or charge, and takes a –2 penalty on all attack rolls and a –4 penalty to Dexterity. An entangled character who attempts to cast a spell must make a Concentration check (DC 15 + the spell’s level) or lose the spell.
Thus the Entangle spell does quite a lot, stopping or at best reducing movement, inflicting penalties on all attacks, a penalty to Dexterity, and making it difficult to cast spells.
Slick Ice as you propose would only be a problem for a character if they tried to move, causing them to make a Dexterity or Balance check. Then it's basically just the cleric spell Ice Slick or the Wizard/Sorcerer spell Grease, neither of which Druid's get.